Pajor-Świerzy Anna, Pawłowski Radosław, Sobik Piotr, Kamyshny Alexander, Szczepanowicz Krzysztof
Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland.
Abraxas Jeremiasz Olgierd, Piaskowa 27, 44-300 Wodzisław Śląski, Poland.
Materials (Basel). 2022 Jan 1;15(1):305. doi: 10.3390/ma15010305.
Low-cost metallic nanoink based on nickel-silver core-shell nanoparticles (Ni@Ag NPs) was used for the formation of conductive metallic coatings with low sintering temperature, which can be successfully applied for replacement of currently used silver-based nanoinks in printed electronics. The effect of oxalic acid (OA) on the sintering temperature and conductivity of coatings formed by Ni@Ag NPs was evaluated. It was found that the addition of OA to the ink formulation and post-printing treatment of deposited films with this acid provided a noticeable decrease in the sintering temperature required for obtaining conductive patterns that is especially important for utilizing the polymeric substrates. The obtained resistivity of metallic coatings after sintering at temperature as low as 100 °C was found to be 30 µΩ·cm, only ~4 times higher compared to the resistivity of bulk Ni that is promising for future application of such materials for fabrication of low-cost flexible printed patterns.
基于镍银核壳纳米颗粒（Ni@Ag NPs）的低成本金属纳米墨水被用于形成具有低烧结温度的导电金属涂层，该涂层可成功应用于替代印刷电子中目前使用的银基纳米墨水。评估了草酸（OA）对由Ni@Ag NPs形成的涂层的烧结温度和导电性的影响。研究发现，在油墨配方中添加OA并用该酸对沉积膜进行印刷后处理，可显著降低获得导电图案所需的烧结温度，这对于使用聚合物基材尤为重要。发现在低至100°C的温度下烧结后，金属涂层的电阻率为30µΩ·cm，仅比块状镍的电阻率高约4倍，这对于此类材料未来用于制造低成本柔性印刷图案很有前景。
